# AD 47-10-08: Elevator Booster Shifter Horn

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed 49-46
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/841465539E377EEC8625696D00719FC8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-10-08

## The airworthiness directive

47-10-08 LOCKHEED: (Was Mandatory Note 9 of AD-763-3.) Applies Only to Model 49 Serial Numbers 1975 to 1978, Inclusive; 1980; and 2021 to 2059, Inclusive.

Compliance required prior to August 9, 1946.

Rework the elevator booster shifter horn assembly by reducing the width of the teeth on 278488 gear. 0.120 inch should be removed from each end of all the teeth.

(LAC Service Bulletin 049/SB-19 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-763](https://openairdocs.org/tcds/A-763): Lockheed Martin Aeronautics Company; names 1 of 6 models: 49-46

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1 (1 by airframe model, 0 by engine model)
- Makers: Lockheed 1

Models with the most aircraft:

- [Lockheed 49-46](https://openairdocs.org/model/lockheed-49-46): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/47-10-08/models.md
Every aircraft: https://openairdocs.org/ad/47-10-08/aircraft.md

Its text cites no advisory circulars or STCs.

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